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- W4285598052 abstract "We perform a systematic survey of active galactic nucleus (AGN) continuum lags using $sim$3 day cadence $gri$-band light curves from the Zwicky Transient Facility. We select a sample of 94 type 1 AGN at $z<0.8$ with significant and consistent inter-band lags based on the interpolated cross-correlation function method and the Bayesian method JAVELIN. Within the framework of the lamp-post reprocessing model, our findings are: 1) The continuum emission (CE) sizes inferred from the data are larger than the disk sizes predicted by the standard thin disk model; 2) For a subset of the sample, the CE size exceeds the theoretical limit of the self-gravity radius (12 lt-days) for geometrically thin disks; 3) The CE size scales with continuum luminosity as $R_{mathrm{CE}} propto L^{0.48pm0.04}$ with a scatter of 0.2 dex, analogous to the well-known radius-luminosity relation of broad H$mathrm{beta}$. These findings suggest a significant contribution of diffuse continuum emission from the broad-line region (BLR) to AGN continuum lags. We find that the $R_{mathrm{CE}}-L$ relation can be explained by a photoionization model that assumes $sim$23% of the total flux comes from the diffuse BLR emission. In addition, the ratio of the CE size and model-predicted disk size anti-correlates with the continuum luminosity, indicative of a potential non-disk BLR lag contribution evolving with luminosity. Finally, a robust positive correlation between CE size and black hole mass is detected." @default.
- W4285598052 created "2022-07-16" @default.
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- W4285598052 date "2022-07-13" @default.
- W4285598052 modified "2023-09-26" @default.
- W4285598052 title "AGN Continuum Reverberation Mapping Based on Zwicky Transient Facility Light Curves" @default.
- W4285598052 doi "https://doi.org/10.48550/arxiv.2207.06432" @default.
- W4285598052 hasPublicationYear "2022" @default.
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